By Steven Liang, Albert J. Shih
This publication offers readers with the basic, analytical, and quantitative wisdom of machining method making plans and optimization in response to complicated and functional figuring out of equipment, mechanics, accuracy, dynamics, tracking options, and keep watch over options that they should figuring out machining and laptop instruments. it's written for first-year graduate scholars in mechanical engineering, and is usually applicable to be used as a reference ebook via training engineers. It covers issues corresponding to unmarried and a number of aspect slicing tactics; grinding methods; desktop instrument parts, accuracy, and metrology; shear tension in slicing, slicing temperature and thermal research, and computing device software chatter. the second one element of the publication is dedicated to “Non-Traditional Machining,” the place readers can locate chapters on electric discharge machining, electrochemical machining, laser and electron beam machining, and biomedical machining. Examples of real looking difficulties that engineers are inclined to face within the box are integrated, in addition to suggestions and motives that foster a didactic studying adventure.
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Additional info for Analysis of Machining and Machine Tools
A) For the straight sections of this cut, estimate the average chip thickness, the MRR, and power; (b) repeat the above for the inside corner section; (c) repeat the above for the outside corner section; and (d) based on your calculations, what is an appropriate way to program the CNC machine tool path to keep the power consumption constant when making corners? 40 mm 5 mm Axial depth of cut = 60mm 20 mm 4 flute end mill D=20mm 4. 1 mm/rev, regardless of the spindle speed, can be applied safely without breaking the bit.
2π N 8 The force on the drill is more difficult to estimate. 29) 4 NNt 4 Nt vN t Example A standard 12 mm, 120° point angle, two-flute high speed steel (HSS) twist drills will be used to make 50 mm deep holes on aluminum workpiece. The maximum power available to drive the drills is 2 kW, the drilling time to produce one hole is not to be greater than 5 s. The transfer station must make 1200 holes before it can be stopped to change worn out drills. 75 kN or the drill may break. 4 / v)10 . Determine the cutting conditions (feed rate and rotational speed) to analyze if it is possible to meet all the constraints on time, tool life, force, and power.
The drill press offers a spindle speed ranging from 120 to 5000 rpm. Find the minimum power (in W) needed to drill the hole in less than 45 s. 5 mm/min. 58 mm/rev for the smallest possible specific cutting energy. 4). 48) = 8, 664 J/min = 144 W 4 Homework 1. Face milling is to be done on the heads of an engine using a 12-tooth cutter. In the following figure, the idealizations of the cutter and the engine head are shown. The specifics of this operation are: Cutting tool: 12 square carbide inserts with a 1 mm corner radius will be used.